Component `extract_subset`

Extract a subset from a mesh that is represented by a tag attribute (of type `long`)

Possible options:
```
struct ExtractSubsetOptions
{
    std::string type;
    std::string input;
    std::string output;
    std::string tag_name;
    long tag_value;
    long embedding_cell_dimension;
    long subset_cell_dimension;
};
```